91404007 has 2 divisors, whose sum is σ = 91404008. Its totient is φ = 91404006.

The previous prime is 91403993. The next prime is 91404017. The reversal of 91404007 is 70040419.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91404007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91404017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45702003 + 45702004.

It is an arithmetic number, because the mean of its divisors is an integer number (45702004).

Almost surely, 2^91404007 is an apocalyptic number.

91404007 is a deficient number, since it is larger than the sum of its proper divisors (1).

91404007 is an equidigital number, since it uses as much as digits as its factorization.

91404007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 91404007 is about 9560.5442836692. The cubic root of 91404007 is about 450.4588028450.

The spelling of 91404007 in words is "ninety-one million, four hundred four thousand, seven".